2. Lesson Identification Class : Ten Subject : English First paper Unit: Twenty One Lesson: 6 Today’s topic :The Killing Water

3. Previous knowledge test

8. New vocabulary Arsenic, Arsenicosis, contaminated, surface, contain, overnight,

9. Arsenic affected people New affected people

14. It is believed that vitamins A, C and E are effective for treatment of arsenicosis

15. The majority of the tube wells in Bangladesh are free from arsenic, but they need to be tested to separate the safe from the unsafe and in many areas, this has not yet been tested for arsenic, should be painted green if they are safe or red if they are unsafe. Unsafe  Safe

16. Deep tube wells are free from arsenic and bacteria although they will need testing in the future to ensure that it still the case. Deep tube well water

17. Surface water in ponds and rivers is a potential source of arsenic free water. Pond water River water

18. If a latrine empties into a pond,

20. if a pond is used for fish cultivation with the use of cow dung,

22. the water should not be used for drinking even after treatment.

23. Rain water can be collected. This water is free from arsenic and bacteria although must be taken to ensure that the container is clear. Rain water harvesting system

24. If there is no source of water other than a red tube well make sure you do the following: Leave the water to stand in a pitcher overnight and filter the upper portion through another pitcher containing sand which will remove the arsenic. Filtering System

26. Write down the safe sources of water on your khata.

28. Imagine that your area has been hit by arsenicosis and you are planning to publish a leaflet to make people aware of the danger. Make a list of what should go in the leaflet.